Noncracking joint covering and finish



March 14, 1939. A. c. BENEDICT 2,150,399

NONCRACKING JOINT COVERING AND FINISH Filed April 19, 1957 INVENTOR.NrHo/VY @EA/.ep T.,

` A TTORN E Y.

Patented Mar. 14, 1939 UNITED STATES PATENT oFFIcr.

NONCRAGKING JOINT COVEMNG FINISH 3 Claims.

-This invention has to do with a joint covering andfinish which isdesigned primarily for iuse in the building arts, and is concernedparticularly with the type of joint illustrated and described in myapplication Serial Number .89,7419 which is to -be issued April 20,1937, under Patent Number 2,078,049.

A joint of the type with which this invention is concerned is ordinarilyfound in a wall-like structure made of a plurality of panels or slablikemembers arranged with their outer surfaces in substantially the sameplane to form a'sup- Iporting structure for a coating or finish.

Due to such conditions as 'temperature changes, moisture changes',drying out 'of the `material from which the panels are made, or thesetting up of stresses on the panels incident to building "constructionor subsequent settling, it is important that the edges of these panelsbe relatively movf able, and this invention is intended to accommodatesuch movement. Ordinarily a supporting or weight carrying element isalso included in the vbuilding structure at the adjacent edges ,of thepanels, so as to support these structural parts.

-In my above 'identified patent application various types of joints areillustrated in which provision is made for preventing adhesibn of thefinishing coating toy the panels along Zones at the yedges of thepanels, whereby strains and stresses incident to displacement of the4panels, arev distributedover a relatively Wide area of theflni'shingmaterial.

y The present invention is adapted to tprovide a continuous surfaceunbroken by ridges or sags', due to the use of a plurality of panels, byproviding a coating and under structure therefor which comprises a paneland a resilient elastic porous member arranged adjacent thereto, seas toVform a comparatively smooth surface for the coating.

A coating of the Ageneral character 'disclosed inl my copendingapplication is then used .to cover this surface and provide thecontinuous Vsurface desired.

.The resilience, elasticity and porosity `of this member incombinationwith my said'coatingthen permits various movements of myunderlying panels without damaging the outside surface ,of my coating.This result follows because the resilientelastic and porous `member isable to withstand deformation without imparting to the coating the fullfracturing influence which would be found otherwise when adjacent panelswere moved; my described coating works in conjunction with thiscushioning eiect to prevent the iullmovementof theunder structure fromcracking the outer surface of the coating.

A more limited object is to facilitate the lconstructiOn of 'a wall-likesurface having the" characteristics abovedescribed by maintaining theresilient 'elastic ahdporous Vmember'in proper positin 'by 'thefrictinal'vor abutting contact of adjacent panels. A

"The invention, therefore, comprises a linished and covered joint inwhich an Yunderv structure is formed of a panel vand-an adjacentresilient elastic porous member, and the two vare thencovered with acoating" of flexible elastic finishing mate'- rial such as' herein'describedjthe said coating is vbonded to the paneland'resilient'elastic porous member. For a full and more completeunderstanding of the invention, reference may be had to the followingdescription and accompanying drawing, wherein Figure 1 is a sectiontaken through a joint made in accordance ywith ,thisinvent'iom Figure 2isa view similar to Figure 1 of a modified form,

Figure 3 is another similar sectional showing of vstill anothermodification,

Figure 4 is another vifw taken on the same relative plane, butI of afurther modiflcatien; likewise 'I "Figure 5 is a sectional showing ofanother modified form, Y

Figurer` 6Y` develops another modication, and Figure 7 is asimilar'viewy of still anothermodied form. 'n Referring now tothedrawing, wherein like reference characters denote corresponding parts, apairv of ,building panels are shown at I0 and I'I :'ashaving edgesI 2and I3 which are spaced apart. These panels I0 and `II ,may be of anysuitable composition which khas met with approval for the particularbuilding purposefit is designed. Panels suchA as theseare well-known tothose fskilled in the structural arts. v In the` form of the inventionshown in Figure 1, itis notable that the edges I2 and I3 aresubstantially perpendicular to the broad faces 'of `the panels IIland II.` Interposedbetween these edges I2v and I3 isfa supporting-bodydesignated I 4,'which is designed to completely fill up the'spacefbtween the edges IZ'and I3. `This supporting body should be of aresilient elastic porous material having the ability to permit ofrelative displacement between the panelsl Illy and.

I I. As a material for the supporting body I4 an appropriate corkcomposition will provide the deother purposes.

sired results. A Vsupporting 'stud or beam such as is shown at I5 ofFigure 3 is preferably placed under supporting member I4 and theadjacent edges of panels 'I0 and II.

A finishing coating is designated I6, and is` shown as appliedcontinuously over the panel I0, supporting body I4 and panel I I. Thiscoating or finishing material should have the properties of elasticityand flexibility to the degree necessary to accommodate an appreciableamountof movement between the edges of the panels ID and I I. Due to thespacing of the edges I2 and I3 a comparatively wide distance apartthestresses engendered by such relative displacement will be distributed.over a corresponding area of the finishing coating I6.

The coating or finishing material of the type described in my saidcopending application is preferably used. One example of a compositionof such a finishing material is found in said ap'- plication as follows,and it is noted that the proportion of the material is given by weight:

Fibrous asbestos pounds-- 3 Ground mineral do V 1 Elastic varnish fluidounces 45 MineralY spirit do\ The varnish used in this .example is about50% volatile by volume, and the asbestos used contains fibres ofsubstantial length. The Vground mineral may be fine or relatively coarsefor texturing or It is adapted to be applied in a rather thick coating ogli or more.

Referring now more particularly to Figure 2, a slightly modified type ofjoint is shown in which the edges of the panels I0 and II are disposedat an acute angle with respect to the surface which receives thefinishing coating I6. 'I'hese edges are designated I'I and I8, and areeffective to provide a space between the panels. which is narrower atthe top edges at the surface vto which the coating I6 is applied than atthe bottom. A resilient elastic supporting body I4 corresponds in shapeto these inclined edges I'I and I8, and fills up the space therebetween.

the edges I2 and I3 of the panels Ill and II are perpendicular tothebroader surfaces of these panels, but the supporting body I4 engagesonly the edge I2, being spaced from the edge I3. This free space betweenthe edge I3 and supporting body I4 imparts the capability of the panelsI0 and I I to flex more readily.

It is notable that in this arrangement a supporting structure I5 isemployed to maintain the supporting body I4 in position between theedges I2 and I3. It is also important to note that a small amount of thefinishing material I4 has entered into the space between the edge I3 andbody I4, as shown at I9.

Referring now more particularly to Figure 4, the panels I0 and IIarershown as having the usual right-angular edges I2 and I3, while thesupporting body I4 is shown as having inclined edges 20 and 2I that arespaced from the edges I2 and I3 respectively. It is notable that thebody I4 is wider at the top than at the bottom, and that the finishingmaterial I6 enters in the space between the edges I2 and 20, as shown at22, and I3 and 2|, as shown at 23. The supporting In the form of theinvention shown in Figure 3,

structure I5 is'also shown for the purpose of maintaining the supportingbody I4 in position.

Referring now more particularly to Figure 5, a resilient elastic porouspanel, such as a cork composition, is shown at 24- as having an edge 25that is spaced from an edge 26 of a panel 2'I. The finishing material I6is applied over the panels 24 and 21 somewhat enters the space betweenthe spaced edges 25 and I6.

A somewhat similar arrangement is shown in Figure 6, in which the edges25 and 26 meet; the relative movement between the panels beingaccommodated by the porous and resilient structure of the corkcomposition panel 24.

In Figure 7 the panels III and II are shown as having theedges I2 and I3spaced a slight distance apart. Ihe upper surface of the panel I0, whichisdesignated 28, is cut away to provide a recess 29`in which ispositioned a supporting body 3E! of the resilient elastic porousmaterial, such as a cork composition. This body 3D extends over into thespacebetween the edges I2 and I3 to engagement with the edge I3. Afinishing material I6 is applied continuously over the surfaces of thepanels I0 and II and the body I3.

While preferred specific embodiments of the invention are hereinbeforeset forth, it is to be clearly understood'that I am not to be limited tothe exact constructions illustrated and described, because variousmodifications of these details may be provided in putting the inventioninto practice within the purview of the appended claims.

I claim:

1. In building structure adapted to provide a continuous surface, anunder structure for a coating comprising a panel and a resilient elasticporous member arranged adjacent thereto, and a stable coating of aflexible, elastic finishing material bonded to! said panel andvsaidmember, said coating attaining a thickness of alf at the juncture ofsaid panel and member and comprising particles of solidY material,fibrous material, and elastic adhesive material from the class ofelastic Varnish.

2. In building structure adapted to provide a continuous surface, anunder structure for a coating comprising a panel and a resilient elasticporous member arranged adjacent thereto, and a `coating of a flexible,elastic nishing material bonded to said panel and said member, saidcoating comprising particles of solid material including a substantialamount of substantially fieXible particles and elastic adhesive materialfrom the class of elastic Varnish. Y

3. In building structure, a finished joint comprising a pair of panelshaving edges spaced apart, said edges defining a space between thepanels which is as narrow at the surface to be coated as it iselsewhere, a member of a resilient elastic porous material interposedbetween said spaced edges, and a continuous coating of flexible elasticfinishing material comprising particles of solid material, fibrousmaterial and elastic adhesive material from the class of.elastic'varnish applied to said panels and over said member and bondedfixedly to the surfaces of said panels at their edges adjacent saidmember, said'coating attaining a thickness of substantially gli".

ANTHONY C. BENEDICT.

